Convert AVI to MP3
Convert AVI to MP3 for free, right here in your browser. The video never leaves your device, however large it is.
- Free
- Runs on your device
- No account
- No limits
One file at a time. The video is converted on your own device, so nothing is uploaded and there's no size limit beyond what your browser can hold.
How to convert AVI to MP3
- Drop your AVI file in the box above, or click the box to pick one.
- The first video also fetches the conversion engine, about 7MB, which your browser then keeps. After that it starts straight away.
- Watch the progress bar. Your own machine is doing the work, so leave the tab open until it finishes, then download.
Why convert AVI to MP3?
For keeping the sound from a AVI and dropping the picture.
This throws the picture away and keeps the sound, which is quick work even on a long recording. If the audio inside is already MP3, it is lifted out untouched rather than squashed a second time.
The file gets dramatically smaller, since the picture is almost all of a video's size.
About the two formats
AVI: A format from the 1990s that refuses to die. Still what some old software insists on.
MP3: Audio only, understood by everything ever made. The usual way to keep just the sound.
A video file is a box with codecs inside it, and the box and its contents are separate things. Moving a video into a different box is bookkeeping, and takes a second. Changing the codec means rebuilding every frame, and takes about as long as the video runs. That's the whole difference between the quick conversions here and the slow ones.
Common questions
Is the AVI to MP3 converter free?
Yes, properly free. No paid tier, no trial, no watermark on the result and nothing to sign up for. Put as many files through it as you like, as often as you like.
Are my files uploaded to a server?
No. The AVI to MP3 converter runs inside your browser, on your own machine, so your files never go anywhere. Big ones are fine too, up to whatever your browser can hold.
How do I get the audio out of a AVI file?
Drop the file and the picture is discarded, leaving the sound as a MP3. If the audio inside is already MP3 it is copied out exactly as it was, so nothing is compressed a second time. Otherwise it is encoded once, at a quality setting high enough that speech and music both survive it.
Does extracting the audio reduce its quality?
Only if it has to be re-encoded, and even then the setting used is a high one. What it can never do is improve on the sound already in the video. If the recording was quiet or muffled, the MP3 will be quiet and muffled too, at a fraction of the file size.
Is there a limit on the size of the video?
Not one we set, but there's a practical one. The whole file is held in your browser's memory while it works, so very large files can run a tab out of room, and a phone gives up sooner than a computer. Files up to a few hundred megabytes are comfortable on an ordinary machine.